Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses (Components of Accrued Expenses) (Detail)

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Accrued Expenses (Components of Accrued Expenses) (Detail) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Accrued Liabilities [Line Items]    
Accrued Wages and Related Costs $ 259,910 $ 163,305
Accrued Officer Compensation 235,469 327,469
Accrued Professional Services 185,400 531,728
Accrued Warranty Obligations 198,016 167,503
Accrued Interest 160,649 171,435
Other Accrued Expenses 36,488 28,331
Total $ 1,075,932 $ 1,389,771